Plumbing service clamp



J. W. WELLS PLUMBING SERVICE CLAMP July 22, 1930.

Filed 001:. 29. 1926 zlwuenl oz (kWh/$5 W PVelZs;

a desired strength and Patented I 1930 UNITED srAras rATENT "OFF E mwmir. w. warms, o: macaroni rumors; assronon, a! unsrm assronm'rs, 'ro

mmm co or nnca'rua, rumors, A coaroBa-rron or rumors rnuuarne snavron cam? 'Applieation 11.111 October as, 1920. Serial m. 14t,ooe.

The present invention relates to improvements in plumbing service clamps which are. 'fi

j employed in tapping water orgas mains.

ere a water or gas main, to be tapped is of such light weight material, or ,has, from long use, so deterioratedas notto have sufiicient strength to be properly engaged by a tap or branch or to bear the weight of a service pipe, it is customary to employ what isknown' to the trade as a service clamp.

Such clamps, comprise essentially a saddle like. member or body which is adapted to'beappliedand conform substantially to the cur-- vature of the main, said saddle member hav- 151ing a lateral bore adapted to receive, the

branch pipe, and clam ing means for secure- 1y fastening such sa dle in position on a main.

The body members of such clamps are commonly constructed of malleable iron. While clamps of this material are entirely satisfactory from the standpoint of ossessing the eing're atively inexnsive, the are objectionable or ineflicient 26 or use wit mains containing fluidunder relatively high pressures. The malleable iron castings composing the bodies. of the clamps are of'such a porous nature that fluid under high ressure frequently escapes to therethrough mm the mains to which such clamps are appiied.

One of the o v is toiprovide a service clamp which will be free om the objection noted and will positively'firevent any leakage of fluid through the wa of the clamp. I 1

With thisand other ends in view, the invention consists in the construction that will be hereinafter more particularly described, reference being had ,to the accompanying drawing in whlch:

Figure 1 is a plan of a service clamp, constructed in accordance with" the present invention, shown in position on a main;

Figure 2 is a transverse sectional-view substantially on the line 2-2 of Figure 1.

Figure 3 is alongitudinal section on the line 3-3 of Figure'2.

' Figure 4 is adetail perspective view of the improved in-inverted' position.

jects of the present invention Referring to the drawing in the several main such as is commonly employed for; gas,

water or other fluid under pressure.

I res of which like reference characters in dlcate corresponding parts, '1 designates a which the clamp ma be securely fastened to the main; The sadd e member is provided as usual with a lateral bore 6, to receive the branch'pipe.

saddle mem er 2 of the service clamp. does not directly contact with the'main 1, to which v a l Accordln to the present invention, the

the passage of fluid under pressure, is prof vide This bushing'comprises a body 7 having a concave inner face or surface 8, which will conform to the contour of the main to which the clamp is applied, and an aperture or opening in al gnment with the branch pipe bore of the saddle 2. @As shown, the bushing body includesv a tubular projection 9, which extends into the branch pipe bore 6, of the saddle member 2.

member is provided an annular seat 10, to receive the usual soft metal gasket 11, which is provided for preventing any possible leakage by reason of inequalities in the meeting surfaces of the main and service cla .The tubular portion 9, of the bushing extends throughout the length of the branch pipe bore 'of the saddle member 2, and adjacent its outer end it-is interiorly threaded to provide a ready means for effecting attach- .ment of the branch pipe.

From the foregoing description and the drawing, it will e seen that the invention provides a plumbing service clamp which .includes a lining. or ushing of metal impervious to the passage of fluid under pressure about the inlet opening thereof and interiorly of the bore in which the branch pipe In the concave surface 8, of the bushing is received. .The improved clamp willthe'rea brass bushing arranged against the inner i fore completely overcome the objection to similar evices as commonly constructed hereinbefore referred to. v

The bushings may-be made and sold as articles of manufacture. separate from the clamp bodies or, if-preferred, such bushings may be incorporated with the clamp bodies at the time of makin the latter. a

If preferred, the hning may be cast into fie suitable recess formed in the saddle memr. Having thus described the invention, what is claimed is:

1. The combination with a plumbing service clamp comprising a body, provided with a lateral bore to receive a branch pipe, and means for securing said body to a main, of

face of the clamp body about the bore opening therein, so that it will lie between and in contact with said body and a main to which the clam ture in alignment with said bore.

2. The combination with a plumbing service clamp comprising a body, provided with a lateral bore to receive a branch pipe, and means for securing said body to a main, of A a bushing of metalimpervious-to the pas- 'bination: o

'the inner end of the tubu sage of fluid under pressure arranged against the inner face of the clamp body about'the bore opening therein, so that it will lie betweenand in contact with said body and a main to which the clam is applied, and having atubular portion t bore;v

3. In a plumbing service clam the comranch pipe, straps adjustably connected to said saddle member and adapted to embrace a main to which the clamp is to be secured, a

bushing of metal impervlous to the passage of fluid under pressure adapted to be sitioned between the main to which the c amp1 is to be applied and the saddle member an havin a tubular projection that will extend into t e branch pipe bore of the saddle member, said tubular bushing being interiorly threaded adjacent its outer end, and an annular shaped soft metal gasket surrounding ar bushing, whereby it will be compressed between the bushing and a main when. the clamp issecured in position thereon. 1

In testimony whereof I have hereunto set my hand. U e

. I W. WELLS.

is applied, and having an ap erat extends into said a'malleable iron sad e member v rovided with a lateral bore to receive a 

